5261 libm should stop using synonyms.h

@@ -25,11 +25,11 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak log1pl = __log1pl
+#pragma weak __log1pl = log1pl
 
 /*
  * log1pl(x)
  * Kahan's trick based on log(1+x)/x being a slow varying function.
  */